Great mixer for keyboards
I'm very happy so far with the Makie 402VLZ4 mixer. While it's less mixer than one would need for even a trio, I use it as a "submixer" it and has solved an immediate problem for me, allowing me boost the signal from my Nord Electro keyboard. (The Nord has a notoriously low output signal and I was getting swamped on gigs even with Nord and my QSC K10 cranked). The gain knobs allows you to boost or attenuate each of the two mono channels (1 & 2), while the Level and Main mix knobs control the relative mix of the channels and overall level of the signal out to your powered speakers. As a multi-instrumentalist, If I want to add an additional keyboard or acoustic guitar, I can do that within my own submix and send the signal to my personal powered monitor and from there to the house board if I need to do that. While I don't generally use it, the 402VLZ4 has a single stereo channel (3 & 4), which is great for sending a stereo keyboard to a pair of powered speakers or to the house PA if desired. Unfortunately, there is no gain knob on that channel, so if you need that, you can send R & L to 1 & 2, engage the pan button on each channel and pan hard left and hard right to give you stereo from a pair of mono channels. My one complaint about this line from Mackie (and just about everyone else marketing mixers) is that they oversell on the number of channels. This is essentially 3 channel mixer (not a four) and one of the channels is stereo, thus limiting you to two mono channels.